I've been on Methotrexate for 8 weeks now. For the past few days, I've noticed my gums are very sore, and are now bleeding at night when I floss. I have a few small sores on my gums, too. Could it be the methotrexate? And if so, what can I do about it? I will go to the dentist if I need to, but it is kind of expensive, so I'd rather not if I don't have to.